Determination of temperature dependences of material constants for lead-free (Na0.5K0.5)NbO3–Ba2NaNb5O15 piezoceramics by inverse method

Journal article
(Original article)


Publication Details

Author(s): Yoshida K, Kakimoto K, Weiß M, Rupitsch S, Lerch R
Journal: Japanese Journal of Applied Physics
Publisher: Japan Society of Applied Physics
Publication year: 2016
Volume: 55
Journal issue: 10S
ISSN: 0021-4922
Language: English


Abstract


The enhancement of the piezoelectric, dielectric, and elastic properties of lead-free piezoceramics is essential to achieving a usable alternative to common lead-based piezoceramics. In this contribution, the temperature dependences of the material constants for 0.985(Na0.5K0.5)-NbO3–0.015Ba2NaNb5O15 (NKN–1.5BNN) were characterized and compared with those of MnO-doped (Na0.5K0.5)NbO3 (NKN–Mn). The material constants were determined by the simulation-based inverse method. As a result, NKN–Mn and NKN–1.5BNN were found to show significant differences in the temperature behaviors of piezoelectric, elastic, and dielectric constants. In particular, for temperatures less than 40 °C, material constants that mainly affect shear mode vibration in NKN–1.5BNN gradually increased with increasing temperature, whereas those of NKN–Mn remained constant because of a different crystal structure. In addition, we explain the observed mechanical softness of NKN–1.5BNN in the shear direction on the basis of characteristic material constant relations, macroscopic (scanning electron microscopy), and crystal structure examinations (X-ray diffractometry).



FAU Authors / FAU Editors

Kakimoto, Kenichi Prof.
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)
Lerch, Reinhard Prof. Dr.-Ing.
Lehrstuhl für Sensorik
Rupitsch, Stefan Dr.
Lehrstuhl für Sensorik
Weiß, Manuel
Lehrstuhl für Sensorik


How to cite

APA:
Yoshida, K., Kakimoto, K., Weiß, M., Rupitsch, S., & Lerch, R. (2016). Determination of temperature dependences of material constants for lead-free (Na0.5K0.5)NbO3–Ba2NaNb5O15 piezoceramics by inverse method. Japanese Journal of Applied Physics, 55(10S).

MLA:
Yoshida, Katsuya, et al. "Determination of temperature dependences of material constants for lead-free (Na0.5K0.5)NbO3–Ba2NaNb5O15 piezoceramics by inverse method." Japanese Journal of Applied Physics 55.10S (2016).

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Last updated on 2018-19-04 at 03:34